linux的进程的疑问

在root下面ps -A列出进程如下：请高手对其中作一些说明
ps:我安装的是Mandriva 2007 free，看网上说是全球下载排第一的就下了。整整4个iso。装好后，觉得不太适合国人使用，再加上看的书很多都以red hat为基础，故打算转用Ubuntu
PID TTY TIME CMD
1 ? 00:00:01 init
2 ? 00:00:00 migration/0
3 ? 00:00:00 ksoftirqd/0
4 ? 00:00:00 events/0
5 ? 00:00:00 khelper
6 ? 00:00:00 kthread
8 ? 00:00:00 kblockd/0
9 ? 00:00:00 kacpid
99 ? 00:00:00 kseriod
135 ? 00:00:00 pdflush
136 ? 00:00:00 pdflush
137 ? 00:00:00 kswapd0
138 ? 00:00:00 aio/0
788 ? 00:00:00 kpsmoused
800 ? 00:00:00 kjournald
895 ? 00:00:00 udevd
996 ? 00:00:00 khubd
1403 ? 00:00:00 ata/0
1406 ? 00:00:00 scsi_eh_0
1408 ? 00:00:00 scsi_eh_1
1498 ? 00:00:00 kjournald
1895 ? 00:00:00 syslogd
1986 ? 00:00:00 atd
2028 ? 00:00:00 hpiod
2060 ? 00:00:00 klogd
2093 ? 00:00:00 dbus-daemon
2129 ? 00:00:00 crond
2175 ? 00:00:00 acpid
2200 ? 00:00:01 hald
2201 ? 00:00:00 hald-runner
2204 ? 00:00:00 python
2308 ? 00:00:00 hald-addon-acpi
2342 ? 00:00:00 hald-addon-keyb
2372 ? 00:00:00 hald-addon-keyb
2607 ? 00:00:00 hald-addon-stor
2627 ? 00:00:00 kgameportd
2633 ? 00:00:00 ac97/0
2768 ? 00:00:00 ifplugd
3118 ? 00:00:00 dhclient
3280 ? 00:00:00 portmap
3335 ? 00:00:00 avahi-daemon
3351 ? 00:00:00 xfs
3394 ? 00:00:00 rpc.statd
3503 ? 00:00:00 kdm
3506 ? 00:00:00 cupsd
3509 ? 00:00:00 xinetd
3570 ? 00:00:00 clamd
3603 ? 00:00:00 freshclam
3644 ? 00:00:00 lisa
3717 tty1 00:00:00 mingetty
3719 tty3 00:00:00 mingetty
3720 tty4 00:00:00 mingetty
3721 tty5 00:00:00 mingetty
3722 tty6 00:00:00 mingetty
3907 ? 00:00:00 gam_server
4163 tty7 00:00:10 X
4164 ? 00:00:00 kdm
4281 ? 00:00:00 startkde
4351 ? 00:00:00 dbus-daemon
4352 ? 00:00:00 dbus-launch
4380 ? 00:00:00 s2u
4427 ? 00:00:00 scim-launcher
4443 ? 00:00:00 scim-helper-man
4444 ? 00:00:00 scim-panel-gtk
4448 ? 00:00:00 kdeinit
4453 ? 00:00:00 dcopserver
4454 ? 00:00:00 scim-launcher
4461 ? 00:00:00 klauncher
4463 ? 00:00:00 kded
4477 ? 00:00:00 kwrapper
4479 ? 00:00:00 ksmserver
4484 ? 00:00:00 kwin
4491 ? 00:00:01 kdesktop
4495 ? 00:00:00 kicker
4497 ? 00:00:00 kio_file
4499 ? 00:00:00 artsd
4501 ? 00:00:00 kaccess
4507 ? 00:00:00 klipper
4511 ? 00:00:00 knotify
4516 ? 00:00:00 xsettings-kde
4518 ? 00:00:00 korgac
4551 ? 00:00:01 konsole
4552 pts/1 00:00:00 bash
4798 ? 00:00:07 amarokapp
4806 ? 00:00:00 kio_file
4807 ? 00:00:00 ruby
4808 ? 00:00:00 kio_file
4809 ? 00:00:00 kio_file
4810 ? 00:00:00 kio_file
4966 tty2 00:00:00 mingetty
4978 pts/1 00:00:00 bash
5011 ? 00:00:00 kio_file
5012 ? 00:00:00 kio_thumbnail
5020 pts/1 00:00:00 ps